Disruptable pin for motor-starting devices



Sept, 4, 1923.

F. E. ANDERSON DISRUPTABLE PIN FOR MOTOR STARTING DEVICES Filed NOV. 30 1921 A TTORNE'Y Patented. Sept. t, 1923.. s

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Application filed Nven1ber30, 1921.. Serial No. 518,227.

it appertains to make and use the same, refcrence being had to the accompanyingdraw ings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to' an engine starting device and particularly to means for cranking the by manually operated ratchet mechanism. i

The primary object of the invention is to provide an inexpensive, simple, durable and efficient device which be manually operated so as to turn 0v r the crank sha tof the engine to start it, the mechanism being so arrangedthat in the event of back fire, liability of the person operating the crankinn device beinginjured will be avoided.

There is a novel arrangement of the parts comprising my invention, which will beapparent by reference to the following description in connection with the accompanying drawings, in which Fig. 1 is a side elevational view of part of a vehicle with an engine thereon and to which my invention is applied.

Fig. 2 is a fragmentary perspective view of the parts of the'engine starter disassociated. y

Fig. 8 is a sectional View through the same the crank shaft being shown in elevation,

and

Fig. 4: is an end view of the engine bed,

showing a clip for holding the operating device in its inoperative position. v

Referring now to the drawings by numerals of reference:

1 designates an engine base frame which mayconsist of atractor frame supported by forward wheels 2 and rear or bull wheels 3.

The engine 4 is provided with the usual with. The sleeve, the disk and the clamping block may be an integralstructure and the .ing lever i l, having 14: but secured thereto, as at 17.

end of the sleeve opposite to that on which is located the disk 7 is provided with threads 9 and is split at 10. When the sleeve is. placed upon the crank shaft 5, it may be fastened thereto by a clamping strap ll, which will cooperate with the block to fasten the sleeve to the shaft 5 through the medium of the fastening devices 12 and 1.5 (see Fig. 2). I

Mounted upon the sleeve 6 is an operata handle 15 and provided with bearing member 16, the major portion of which is spaced. from the lever The bearinn" member 16 coo}erates with the lower end of the operating lever 1% in providing a bearing for: the frangible pivot 18 for the dog or pawl 19 carried thereby and having swinging movement between the lever 14s and the member 16. The dog or pawl has a toe portion 20 adapted to en the ratchet teeth 21 on the ratchet 22, provided with a key 23, which engages the slotted portion 10 of the sleeve 6, the ratchet being secured upon the sleeve by the jam nut 2%, which also clamps'one end of the sleeve 6 to the shaft5. Therefore, when the strap 11 is in place and the nut 2a is secured on the threaded end 9 of the sleeve 6, the sleeve and theratchet will be rigid with the shaft, the lever being guided between one side of the ratchet and the disk 7 and carrying the dog so that it may engage the teeth to rotate the shaft when the lever 1% is swung in one direction as, for example, in a clockwise direction, according to the arrangement shown in Fig. 1.

The dog or pawl can be manipulated by'a ratchet lever 25. pivoted to the lever 14: and connected at 26 to the triangulanshaped dog 19.

It will be observed that the teeth on the ratchet wheel 22 are arranged so that the dog may engage with them in one direction but will ride idly over them in theopposite direction. Therefore, when the engine crank has been turned over and the engine starts tooperate, the ratchet will ride idly over the toe 20 of the dog 19. Then the lever 14 can be swung down until the ratchet lever 25 comes into contact with the bottomof the clip 27 on the base 1, the clip being in line with the path of movement of the lever 25 so that when the lever rests on the bottom of the clip, the dogwill be pulled out of engagement with the teeth and the crank shaft may then continue to rotate as a power medium without interference by the startingmecha nism.

If, on the other hand, the engine back fires while being in; ially operated, the dogw'll swing around until the lever 14. contacts with one of the bull wheels 3 and inasmuch as the pivot 18 is of wood or other 11' aterial sulliciently fragile to break under the action of the of the lever l i coming in contact with the bull wheel, will be seen that the starting mechanism will. be released iron the shaft as soon as the pivot pin 18 is broken, thereby eliminating liability of accident. In this case the bull wheel acts as a bumper for stopping the lever l-l.

It will be observed that when the engine has been cranked, the lever l-l can be leld in an inoperative position with tne dog out of the path of rotation of the ratchet wheel 22 because the le er l-lrwill be held by the spring arms 28 and 25) of the clip 27 and since the lever :25 will rest on the bottom oi the clip. liabilit of the dog moving into engage-merit with he ratchet wheel te th wi be avoided.

The device can be readily applied to the ordinary internal combustion engine and it is not. limited to tractor engines although it is so shown for convenience, and 1 do not limit myself to the breakable pin connecting the pawl to the lever although it is so shown, as the fragile pin can be placed elsewhere as, for instance, it can be used for connecting the ratchet wheel to the shaft or sleeve.

In case the device is applied to an engine where it is not convenient to attach directly to the crank shaft, and where there is not a bull wheel to act a: a bumper, then. the starting device can be mounted on a suitable e2;- tension, suitable bumper provided for luealiing the pin in case of a back fire, and a bracket provided to carry the lever in inoperative position.

lv hat 1 china and desire to secure by Let tors-Patent is:

1. An engine s arting device coinprisir a shaft, ratcl on the shaft, a lever lo on the shaft, a pawl co-operatingwith t lever to the ratchet, abrealzable QlTO'L' connecting the pawl to the lever, and me s for connecting the shaft to the crank shaft of an engine.

2. in engine starting device comprising a crank shaft engagri sleeve, a ratchet wheel rigid with the sleeve a manually actuated lever loose on the sleeve, a ratchet wheel-em pawl, and a fragile pin connecting the pawl to the lever.

3 The combination with an internal com bustion ene'ine, a sleeve rigid on the era-l: shaft of said engine, a ratchet wheel on t sleeve, a ratchet-operating lever loose on the sleeve, a pawl carried by said lever and adapted to normally engage the teeth oi the ratchet wheel, a pawl etracting lever carried by the first named lever a link rod connecting; the pawl retracting lever with the pawl, and a clip on the ennine in the path of t is swinging movement 01: the lever whereby the lever may be caused to be engaged by the clip so that the retracting leverwill contact therewith to draw the pawl out of engagement with the ratchet wheel.

in testimony whereof I alhx my signature.

FRED E. ANDERSON. 

